Avto Engineering Holding Group offered to supply the buses and charging stations for a total of 15.3 million levs ($9.5 million/7.8 million euro), VAT included, according to documents published by Trolleybus Transport - Vratsa.
The company offered to deliver the buses within 330 days and to provide a two-year warranty period.
The brand of the vehicles was struck off from the documents.
Four other bidders were disqualified from participation in the tender.
Trolleybus Transport - Vratsa will finance the project with EU funds under operational programme Environment 2014-2020.
Earlier this year, Trolleybus Transport - Vratsa signed a 9.1 million levs deal with Avto Engineering Holding Group for the purchase of nine trolleybuses. The project also benefits from EU funding under operational programme Environment 2014-2020.
(1 euro = 1.95583 levs)